package com.jungle.system.interceptor;

import com.jungle.common.constant.JwtClaimsConstant;
import com.jungle.common.context.BaseContext;
import com.jungle.common.config.properties.JwtProperties;
import com.jungle.system.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (1==1) {
            return true;
        }
        System.out.println("ThreadId preHandle->" + Thread.currentThread().getId());
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String userTokenName = jwtProperties.getUserTokenName();
        String token = request.getHeader(userTokenName);//authorization
//        String token = request.getParameter(jwtProperties.getUserTokenName());

        //2、校验令牌
        try {
            log.info("jwt校验:{},userTokenName:{}", token,userTokenName);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
//            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            String userId = claims.get(JwtClaimsConstant.USER_ID).toString();

            //设置当前线程的id为当前登录的员工id
            BaseContext.setCurrentId(userId);
            log.info("当前用户id：{}", userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            System.out.println("jwt校验异常：" + ex.getMessage());
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
